WO1999030810A1 - Verfahren und vorrichtung zur reduzierung der stickoxide im abgas einer verbrennungsanlage - Google Patents

Verfahren und vorrichtung zur reduzierung der stickoxide im abgas einer verbrennungsanlage Download PDF

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Publication number
WO1999030810A1
WO1999030810A1 PCT/DE1998/003643 DE9803643W WO9930810A1 WO 1999030810 A1 WO1999030810 A1 WO 1999030810A1 DE 9803643 W DE9803643 W DE 9803643W WO 9930810 A1 WO9930810 A1 WO 9930810A1
Authority
WO
WIPO (PCT)
Prior art keywords
reducing agent
agent solution
exhaust gas
concentration
catalyst
Prior art date
Application number
PCT/DE1998/003643
Other languages
German (de)
English (en)
French (fr)
Inventor
Gerhard Wissler
Günther PAJONK
Manfred Weigl
Lothar Hofmann
Original Assignee
Siemens Aktiengesellschaft
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to AT98966533T priority Critical patent/ATE214628T1/de
Priority to DE59803471T priority patent/DE59803471D1/de
Priority to JP2000538780A priority patent/JP2002508466A/ja
Priority to EP98966533A priority patent/EP1042052B1/de
Priority to DK98966533T priority patent/DK1042052T3/da
Publication of WO1999030810A1 publication Critical patent/WO1999030810A1/de
Priority to US09/596,893 priority patent/US6408619B1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
    • B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2066—Selective catalytic reduction [SCR]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/8696—Controlling the catalytic process
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
    • B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
    • B01D53/9404—Removing only nitrogen compounds
    • B01D53/9409—Nitrogen oxides
    • B01D53/9431—Processes characterised by a specific device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
    • B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
    • B01D53/9495—Controlling the catalytic process
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
    • F01N2900/06—Parameters used for exhaust control or diagnosing
    • F01N2900/18—Parameters used for exhaust control or diagnosing said parameters being related to the system for adding a substance into the exhaust
    • F01N2900/1806—Properties of reducing agent or dosing system
    • F01N2900/1818—Concentration of the reducing agent
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the invention relates to a method and a device for the catalytic conversion of nitrogen oxides in the exhaust gas of an incineration plant, in particular a diesel engine.
  • pollutants can be produced to a not inconsiderable extent, which are released into the environment via the exhaust gas and can cause damage there.
  • the nitrogen oxides represent a not inconsiderable rain and forest extinction are discussed.
  • SCR selective catalytic reduction
  • a reducing agent is introduced into the exhaust gas before it flows through a so-called SCR or DeNOx catalytic converter, which reduces the nitrogen oxides contained in the exhaust gas in the presence of oxygen Converts catalyst to harmless nitrogen and water.
  • Ammonia is generally used as the reducing agent.
  • a reducing agent solution into the exhaust gas, from which the actual reducing agent is released.
  • ammonia such a reducing agent solution is, for example, an aqueous urea solution or ammonia water. See the Siemens company publication: SINOx, nitrogen oxide reduction for stationary diesel engines, 1997, order no .: A96001-U91-A232.
  • the determination of the amount of reducing agent to be introduced is extremely difficult. Since fast sensors for direct determination of the nitrogen oxide concentration in the exhaust gas are not yet known, the nitrogen oxide concentration must be determined from parameters characterizing the operating state of the incineration plant, such as, for example, speed, torque or control rod travel. For this purpose, the concentration of the nitrogen oxides in each case in defined operating states of the combustion system in a test bench and stored in a map in a control unit.
  • the concentration of the nitrogen oxides is then read during operation from the parameters characterizing the operating state of the incineration plant, and a corresponding amount of reducing agent or reducing agent solution is metered in.
  • a certain safety distance from the actually required amount of reducing agent must always be maintained in order to reliably prevent the reducing agent from slipping.
  • a little less reducing agent is always added than would be necessary to convert the nitrogen oxides.
  • the object of the invention is to provide a method and a device for the catalytic conversion of nitrogen oxides contained in the exhaust gas of an incineration plant, in which slip of reducing agents is reliably avoided and, at the same time, the conversion rate of the nitrogen oxides is increased compared to the prior art.
  • a method for the catalytic reduction of nitrogen oxides in the exhaust gas of a combustion system, in particular a diesel engine is specified, with a quantity to be metered depending on the operating state of the combustion system, the Jbgas and / or an analyzer a reducing agent solution is determined and introduced into the exhaust gas in the flow direction of the exhaust gas upstream of the catalyst, the reducing agent being released from the reducing agent solution and being reacted with the nitrogen oxides on the catalyst, and according to the invention determining the concentration of the reducing agent solution and the amount to be metered to the determined concentration is adjusted.
  • the invention is based on the observation that, even with a quantity of reducing agent to be metered in, taking into account the storage capacity of the catalyst and the exhaust gas composition, a reducing agent slip can be determined under certain operating conditions. Reduction agent slippage occurs increasingly when the actual the reducing agent is released from a reducing agent solution.
  • the invention is then based on the consideration that the observed reducing agent slip is a result of different concentrations of the reducing agent solutions used. Since a conventional concentration is based on a fixed concentration, there are different concentrations due to manufacturing or evaporation effects.
  • volumetric metering increases the metered volume of the reducing agent solution when the actual concentration is lower than the assumed concentration or when the actual concentration is higher than the assumed concentration
  • the invention allows a further reduction in the safety distance between the actually introduced and the theoretically optimal amount of reducing agent without the reducing agent slipping.
  • a high conversion rate of the nitrogen oxides can be achieved, particularly in an unsteady-state incineration plant, in particular in a diesel engine.
  • the reducing agent solution is usually stored in a closed container, a rapid change in the concentration of the reducing agent solution can be expected. It is therefore sufficient to discontinuously reduce the concentration of the reducing agent solution, e.g. periodically with predetermined intervals.
  • the concentration of the reducing agent solution is advantageously determined discontinuously each time a storage container is filled with reducing agent solution. This makes it possible to take into account production-related concentration differences when filling or also mixing with the old reducing agent solution of another concentration that may still be in the reducing agent tank when dosing. This is particularly advantageous in the case of non-stationary combustion systems, such as, for example, a diesel engine used for traction, if at regular intervals the reducing agent solution of different origins must be replenished at different locations.
  • the dosing accuracy can advantageously be increased even further if the instantaneous concentration of the reducing agent solution is determined when and / or before the reducing agent solution is introduced into the exhaust gas. In this way, factors influencing the concentration, such as density fluctuations in the case of temperature changes, evaporation and contamination of the reducing agent solution, can also be taken into account and compensated for when metering the reducing agent solution.
  • the concentration of the reducing agent solution is preferably determined by measuring the conductivity of the reducing agent - 1 "---- r ⁇ - f. In this case, it must of course be ensured that the reducing agent solution is electrically conductive, as is the case, for example, with an aqueous urea solution However, it is also possible to determine the concentration of the reducing agent solution by measuring its pH value, for example when using ammonia water as the reducing agent solution.
  • an aqueous urea solution from which ammonia is released is introduced as the reducing agent solution.
  • the ammonia released is reacted with the nitrogen oxides on a DeNO x catalyst based on Ti0 2 with admixtures of V 2 0 5 , Mo0 3 and / or W0 3 .
  • the object relating to the device is achieved by a device for the catalytic reduction of nitrogen oxides in the exhaust gas of an incineration plant, in particular a diesel engine, with an exhaust gas line, with a catalyst, with a metering device arranged in the flow direction of the exhaust gas upstream of the catalyst for introducing a defined amount a reducing agent solution in the exhaust gas and a control unit connected to the metering device for inputting and determining the amount of the reducing agent solution to be metered from available parameters that characterize the operating state of the combustion system, the exhaust gas and / or the catalyst, wherein according to the invention a sensor for measuring the Concentration of the reducing agent solution is provided, which is connected to the control unit, which in addition for Ar.p ⁇ csung the su Amount of the concentration available through the sensor is formed.
  • the control unit first determines the assigned nitrogen oxide content of the exhaust gas from the available parameters that characterize the operating state of the combustion system, the exhaust gas and / or the catalytic converter via an implemented map and uses this to calculate the amount of reducing agent required for the conversion of the nitrogen oxides contained in the exhaust gas.
  • a suitable sensor also determines the concentration of the reducing agent solution and passes it on to the control unit.
  • the control unit then adjusts the amount of the reducing agent solution to be introduced into the exhaust gas, which contains the amount of reducing agent required for the instantaneous nitrogen oxide content of the exhaust gas, to the concentration measured by the sensor. If the control unit works with a fixed value for the concentration of the reducing agent solution (eg according to the manufacturer's specification), a corresponding correction factor is determined from the current concentration.
  • control unit initiates the introduction of the adapted amount of reducing agent solution into the exhaust gas via the metering device.
  • the sensor for determining the concentration of the reducing agent solution is advantageously designed as a conductivity sensor.
  • the LeitfX g eitsee.ns r - ⁇ z preferably comprises two electrodes that can be connected to a voltage source and immersed in the reducing agent solution. If a known voltage is applied to the electrodes, a current flows in the reducing agent solution, via which a conclusion can be drawn about the electrical resistance of the reducing agent solution and thus about the concentration of the reducing agent in the reducing agent solution.
  • the high reliability of the conductivity sensor enables the concentration to be measured consistently well over the entire operating time of the incineration plant.
  • the senor preferably consists of a urea-resistant material, such as stainless steel.
  • a urea-resistant material such as stainless steel.
  • a diesel engine with an exhaust pipe 3 and a catalytic converter 5 is shown as a combustion system 1.
  • the catalyst 5 is designed as a honeycomb-shaped DeNOx catalyst for reducing nitrogen oxides according to the SCR process and comprises as main component Ti0 2 and additions to W0 3 , V 2 0 5 and Mo0 3 .
  • the catalyst (5) is a temperature sensor (, • 7 ⁇ - Bes Xm ⁇ ; ri; ----- "" iticeratur T des
  • a metering device 7 for a reducing agent solution R which comprises an injection nozzle 9 and a valve 11, is arranged on the exhaust gas line 3 in the flow direction of an exhaust gas A upstream of the catalytic converter 5.
  • the metering device 7 is connected to a storage container 15 via a feed line 13.
  • An aqueous urea solution is used as the reducing agent solution R, which releases ammonia as a reducing agent when introduced into the hot exhaust gas A of the diesel engine.
  • the sensor 17 is designed as a conductivity sensor, which rather comprises two electrodes (not shown) which connect to a voltage source is connected and immersed in the reducing agent solution. By means of a voltage applied to the electrodes, the electrical resistance and thus the concentration of the aqueous urea solution are inferred from the current then flowing.
  • the sensor 17 is connected to a control unit 19 which additionally detects parameters torque, speed, operating temperature and fuel consumption, which characterize the operating state of the diesel engine, via a data line 21.
  • the control unit 19 is also connected via a control line 23 to the valve 11 of the metering device 7.
  • the temperature T of the catalytic converter 5 is also made available to the control unit via a data line 24.
  • the control unit 19 determines the nitrogen oxide emission of the diesel engine from the parameters available to it via the data line 21 and characterizing the operating state of the diesel engine. For this purpose, the nitrogen oxide emission associated with the values of the corresponding parameters is read out from a map stored in the control unit 19.
  • the control unit 19 also takes into account the catalyst fill level of reducing agent via the temperature of the catalyst 5 and finally calculates the amount of reducing agent to be fed to the exhaust gas A, in particular the amount of the reducing agent solution (R) to be fed from a predetermined concentration of the reducing agent in the reducing agent solution (R).
  • control unit 19 detects the current concentration of the reducing agent solution R in the storage container 15 via the sensor 17 and then uses a correction factor to determine an amount of reducing agent solution that is adapted to the current concentration. Via the control line 23, the metering device 7 is finally caused to inject the adjusted amount of the reducing agent solution R into the exhaust gas A in a known manner via the valve 11 and the injection nozzle 9.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Environmental & Geological Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Biomedical Technology (AREA)
  • Combustion & Propulsion (AREA)
  • Toxicology (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Treating Waste Gases (AREA)
PCT/DE1998/003643 1997-12-17 1998-12-11 Verfahren und vorrichtung zur reduzierung der stickoxide im abgas einer verbrennungsanlage WO1999030810A1 (de)

Priority Applications (6)

Application Number Priority Date Filing Date Title
AT98966533T ATE214628T1 (de) 1997-12-17 1998-12-11 Verfahren und vorrichtung zur reduzierung der stickoxide im abgas einer verbrennungsanlage
DE59803471T DE59803471D1 (de) 1997-12-17 1998-12-11 Verfahren und vorrichtung zur reduzierung der stickoxide im abgas einer verbrennungsanlage
JP2000538780A JP2002508466A (ja) 1997-12-17 1998-12-11 燃焼設備の排ガス中の窒素酸化物を低減する方法及び装置
EP98966533A EP1042052B1 (de) 1997-12-17 1998-12-11 Verfahren und vorrichtung zur reduzierung der stickoxide im abgas einer verbrennungsanlage
DK98966533T DK1042052T3 (da) 1997-12-17 1998-12-11 Fremgangsmåde og indretning til reduktion af nitrogenoxider i et forbrændingsanlægs røggas
US09/596,893 US6408619B1 (en) 1997-12-17 2000-06-19 Method and device for reducing the nitrogen oxides in the exhaust gas of a combustion system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19756251.5 1997-12-17
DE19756251A DE19756251C1 (de) 1997-12-17 1997-12-17 Verfahren und Vorrichtung zur Reduzierung der Stickoxide im Abgas einer Verbrennungsanlage

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US09/596,893 Continuation US6408619B1 (en) 1997-12-17 2000-06-19 Method and device for reducing the nitrogen oxides in the exhaust gas of a combustion system

Publications (1)

Publication Number Publication Date
WO1999030810A1 true WO1999030810A1 (de) 1999-06-24

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PCT/DE1998/003643 WO1999030810A1 (de) 1997-12-17 1998-12-11 Verfahren und vorrichtung zur reduzierung der stickoxide im abgas einer verbrennungsanlage

Country Status (9)

Country Link
US (1) US6408619B1 (ko)
EP (1) EP1042052B1 (ko)
JP (1) JP2002508466A (ko)
KR (1) KR100373433B1 (ko)
AT (1) ATE214628T1 (ko)
DE (2) DE19756251C1 (ko)
DK (1) DK1042052T3 (ko)
ES (1) ES2174545T3 (ko)
WO (1) WO1999030810A1 (ko)

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WO2001014045A1 (de) * 1999-08-25 2001-03-01 Robert Bosch Gmbh Verfahren und vorrichtung zur bestimmung eines reduktionsmittels in einem katalysatorsystem
WO2002057603A1 (de) * 2001-01-19 2002-07-25 Robert Bosch Gmbh Vorrichtung zur dosierung einer enzymfreien harnstofflösung mit sensoreinheit zur kontrolle physikalischer zustandgrössen der harnstofflösung
EP1073509B1 (de) * 1998-04-24 2004-03-31 Argillon GmbH Verfahren und vorrichtung zur katalytischen reduzierung von stickoxiden im abgas einer verbrennungsanlage
FR2909900A1 (fr) * 2006-12-14 2008-06-20 Inergy Automotive Systems Res Methode et systeme pour le dosage d'une solution aqueuse de precurseur d'ammoniac dans des gaz d'echappement d'un moteur
CN100416055C (zh) * 2003-10-28 2008-09-03 日产柴油机车工业株式会社 发动机的排气净化装置和排气净化方法
US7499814B2 (en) 2003-10-31 2009-03-03 Nissan Diesel Motor Co., Ltd. Apparatus for detecting concentration and remaining amount of liquid reducing agent
US7587288B2 (en) 2004-10-29 2009-09-08 Nissan Diesel Motor Co., Ltd. Condition discriminating apparatus for liquid reducing agent
US7658093B2 (en) 2003-10-27 2010-02-09 Nissan Diesel Motor Co., Ltd. Liquid discriminating apparatus and liquid discriminating method
US7743603B2 (en) 2004-11-05 2010-06-29 Nissan Diesel Motor Co., Ltd. Exhaust gas purification apparatus
US7805930B2 (en) 2004-10-29 2010-10-05 Nissan Diesel Motor Co., Ltd. Exhaust emission purifying apparatus for engine
US8033096B2 (en) 2005-06-10 2011-10-11 Nissan Diesel Motor Co., Ltd. Exhaust gas purifying apparatus for engine
FR2986262A1 (fr) * 2012-01-31 2013-08-02 Renault Sas Procede de pilotage de l'injection d'uree dans une ligne d'echappement d'un moteur

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DE19906344A1 (de) * 1999-02-17 2000-08-24 Man Nutzfahrzeuge Ag Verfahren zur Dosierung eines Reduktionsmittels in stickoxidhaltiges Abgas einer Brennkraftmaschine
DE10047519A1 (de) * 2000-09-22 2002-04-18 Bosch Gmbh Robert Verfahren und Vorrichtung zur Dosierung eines Reduktionsmittels zur Entfernung von Stickoxiden aus Abgasen
DE10139142A1 (de) * 2001-08-09 2003-02-20 Bosch Gmbh Robert Abgasbehandlungseinheit und Messvorrichtung zur Ermittlung einer Konzentration einer Harnstoff-Wasser-Lösung
DE20116379U1 (de) 2001-10-05 2002-01-03 PUREM Abgassysteme GmbH & Co. KG, 58706 Menden Vorrichtung zum Dosieren eines gasförmigen Reduktionsmittels
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DE10300408A1 (de) * 2003-01-09 2004-07-22 Emitec Gesellschaft Für Emissionstechnologie Mbh Verfahren zur Behandlung eines Fluids und Wabenkörper
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JP4681284B2 (ja) * 2004-11-18 2011-05-11 日野自動車株式会社 排気浄化装置
JP4327072B2 (ja) * 2004-11-19 2009-09-09 日産ディーゼル工業株式会社 排気浄化装置の液体還元剤判別システム
DE102006033476A1 (de) * 2006-07-19 2008-01-31 Siemens Ag Verfahren zur Überwachung eines Abgasnachbehandlungssystems
WO2008071727A1 (en) * 2006-12-14 2008-06-19 Inergy Automotive Systems Research (Société Anonyme) Method and system for metering an aqueous ammonia precursor solution into the exhaust gases of an engine
US7954312B2 (en) * 2007-05-09 2011-06-07 Ford Global Technologies, Llc Approach for detecting reductant availability and make-up
JP5468732B2 (ja) * 2007-09-27 2014-04-09 国立大学法人豊橋技術科学大学 尿素改質装置及びそれを備えた排ガス浄化装置
FR2928411B1 (fr) 2008-03-06 2012-04-06 Peugeot Citroen Automobiles Sa Procede et dispositif de gestion d'une solution de traitement des gaz d'echappement.
GB2460825A (en) * 2008-06-06 2009-12-16 Delphi Tech Inc Reagent dosing system
US8116961B2 (en) 2009-06-03 2012-02-14 Ford Global Technologies, Llc Controlling of a vehicle responsive to reductant conditions
US8424286B2 (en) * 2009-09-11 2013-04-23 Ford Global Technologies, Llc Vehicle relocatable exhaust system components
DE102009055738A1 (de) * 2009-11-26 2011-06-09 Continental Automotive Gmbh Verfahren zur Bestimmung des Zustandes eines Reduktionsmittels in einem Reduktionsmitteltank
DE102009055716A1 (de) * 2009-11-26 2011-06-01 Continental Automotive Gmbh Reduktionsmitteltank mit einem Tankentnahmesystem
DE102010047416B4 (de) 2010-10-02 2014-01-16 Volkswagen Ag Verfahren und Steuergerät zur Dosierung eines Reduktionsmittelträgers stromauf eines SCR-Katalysators
US20120272639A1 (en) * 2011-04-29 2012-11-01 Kleinfeld Christopher J Reductant Quality Sensor
DE102011118214A1 (de) * 2011-11-11 2013-05-16 Emitec Gesellschaft Für Emissionstechnologie Mbh Verfahren zum Betrieb einer Dosiervorrichtung
KR101379965B1 (ko) * 2012-04-26 2014-04-14 두산엔진주식회사 수트 블로워를 포함하는 선택적 촉매 환원 시스템 및 그 동작 방법
FR2997998B1 (fr) * 2012-11-14 2018-07-27 Inergy Automotive Systems Research (Societe Anonyme) Methode et systeme pour le controle du fonctionnement d'un systeme de stockage et d'injection d'additif dans les gaz d'echappement d'un moteur.
DE102012224095A1 (de) * 2012-12-20 2014-06-26 Continental Automotive Gmbh Reduktionsmitteltank
US9016043B2 (en) 2013-03-14 2015-04-28 Tenneco Automotive Operating Company Inc. Exhaust treatment system with urea temperature rationality diagnostic

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ES2174545T3 (es) 2002-11-01
ATE214628T1 (de) 2002-04-15
DE59803471D1 (de) 2002-04-25
JP2002508466A (ja) 2002-03-19
KR100373433B1 (ko) 2003-02-25
DE19756251C1 (de) 1999-07-22
US6408619B1 (en) 2002-06-25
EP1042052B1 (de) 2002-03-20
KR20010024739A (ko) 2001-03-26
DK1042052T3 (da) 2002-07-08

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